function addslashes(str) {
    str=str.replace(/\\/g,'\\\\');
    str=str.replace(/\'/g,'\\\'');
    str=str.replace(/\"/g,'\\"');
    str=str.replace(/\0/g,'\\0');
    return str;
}
function stripslashes(str) {
    str=str.replace(/\\'/g,'\'');
    str=str.replace(/\\"/g,'"');
    str=str.replace(/\\0/g,'\0');
    str=str.replace(/\\\\/g,'\\');
    return str;
}

